I disagree. Sex is not awkward when you have good sex, and talking about it comes naturally.
On the other hand, if sex with your partner is not good, you’ll find it awkward to talk about it, because deep down we know that sex incompatibility is a huge issue and there would be work to do, and sense of inadequacy, and blaming and tears, and all that uncomfortable stuff… and eventually it should make the relationship end because sex is part of our nature, a way to communicate, to love and feel loved, and the ultimate way of trascending mortality and leave our DNA legacy in this world.